The song comes from Avenue Q, the musical that opened on Broadway in 2003, where the puppet character Trekkie Monster leads the cast in a cheerful number about the internet's adult side. The joke works because the show mixes Sesame Street-style puppets with grown-up humour, and that contrast helped the chorus travel far beyond theatre audiences. Shared in clips, reaction videos and meme edits, it has stayed popular as a shorthand for the gap between innocent browsing and what people actually do online.